Bases: astropy.modeling.projections.Pix2SkyProjection, astropy.modeling.projections.PseudoCylindrical
Parabolic projection - pixel to sky.
Corresponds to the PAR projection in FITS WCS.
\phi &= \frac{180^\circ}{\pi} \frac{x}{1 - 4(y / 180^\circ)^2} \\ \theta &= 3 \sin^{-1}\left(\frac{y}{180^\circ}\right)
Methods Summary
evaluate(x, y) |
Methods Documentation